40413509 has 4 divisors (see below), whose sum is σ = 41505804. Its totient is φ = 39321216.

The previous prime is 40413497. The next prime is 40413523. The reversal of 40413509 is 90531404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35224225 + 5189284 = 5935^2 + 2278^2 .

It is a cyclic number.

It is not a de Polignac number, because 40413509 - 2²⁴ = 23636293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40433509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546092 + ... + 546165.

It is an arithmetic number, because the mean of its divisors is an integer number (10376451).

Almost surely, 2^40413509 is an apocalyptic number.

It is an amenable number.

40413509 is a deficient number, since it is larger than the sum of its proper divisors (1092295).

40413509 is a wasteful number, since it uses less digits than its factorization.

40413509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092294.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 40413509 is about 6357.1620240482. The cubic root of 40413509 is about 343.1696356234.

The spelling of 40413509 in words is "forty million, four hundred thirteen thousand, five hundred nine".